Split welt cementing machine



a 1, 1940- w. L. M cKENZIE 2,216,122

' srm r WELT CEIENTING MACHINE Filed Sept. 16, 1938' 2 Sheets-Sheet 1Fig.1

0 0- w. L. M cKENZlE 2,

\' SPLIT ELT CEIIENTIWNACHINE I Filed Sept.- 16, 1938 2 Shuts-Sheet 2Wmvmp Patented Oct. 1, 1940 UNITED STATES SPLIT WELT CEllIEN TINGMACHINE Wilbur L.' MacKenzie, Beverly, Mass., assignor to United ShoeMachinery Corporation, Borough of Flemington, N. J., a corporation ofNew Jersey Application September 16, 1938, Serial No. 230,296

8 Claims.

This invention relates to machines for applying cement to work parts andis herein illustrated as embodied in a machine for cementing theadjacent faces of the flap portions of a split welt secured to a lastedshoe, which machine is of the type disclosed in United States LettersPatent 2,098,253, granted November 9, 1937, on an appli-' cation filedin my name. It is to be understood, however, that the invention is notlimited to machines of that particular character.

In the manufacture of certain types of shoes such as so-calledstitchdown shoes, it is customary to attach to a lasted shoe of thattype a welt, the edge of which has been split or channeled, one splitportion or flap having been secured to the lasted shoe by means ofstitches and the other split portion later serving to hide the stitchesby being adhesively secured to the firstmentioned split portion afterthe sewing of that portion. In order to perform a satisfactory Splittingoperation on the welt and in order to raise one of the split portions ofthe welt to permit the attachment of theother portion to the shoe, it ispreferable that the welt be in temper. However, as a result of thetempering of the welt, the raised split portion when drying out, whichusual- 1y occurs after the welt is attached to the shoe and beforecement is applied to the channeled or split welt, becomes rather.wrinkled and wavy, and hence presents a distinct problem for theapplication of a uniform coat of cement thereto.

It is, therefore, an object of the invention to provide improved meansfor applying cement to the angularly disposed faces of a channel in awork piece, particularly in a strip such as a welt secured to a lastedshoe, in such a manner that the surfaces of the work to be cementedwillbe coated with a uniformly thick layer of cement regardless ofirregularities in the said surfaces and that soiling of other parts ofthe work by the application of cement beyond the area to be coated issuccessfully prevented.

In accordance with one feature of the invention, the illustrated machineis provided with a tapered nozzle to apply cement to the channel of asplit welt with which nozzle there cooperates a member for holding onepart of the split welt against the nozzle during the entirecement-applying operation progressing along the channel of the welt.

In accordance with another feature of the invention, there is providedin the illustrated machine a driven feed wheel which engages the upperof the shoe to which the split Welt has been secured to as to cause thesplit welt to be moved past the nozzle, the feed wheel being arranged onthe same side of the nozzle as the above-mentioned member for holdingone part or flap of the split welt against the nozzle. In theillustrated machine, theflap-holding member is in the form of a finger,mounted on a support pivotally secured to the nozzle. The finger supportis engaged by spring means to maintain the finger in an inoperativeposition and is actuated by means of an operator-controlled mechanism tomove the finger into work-engaging position.

The above and other features of the invention will now be moreparticularly described with reference to the accompanying drawing andthereafter pointed out in the claims.

In the drawing:

Fig. 1 is a side view of a preferred embodiment of the invention showinga machine with its various moving parts in their operative positions;

Fig. 2 'is a perspective view of the operating tools of the machine;

Fig. 3 is a front view of the operating tools of the machine;

Fig. 4 is a detailed view of part of the operating tools with a piece ofwork, in section, presented thereto; and

Fig. 5 is a view similar to Fig. l but showing the parts in theirinoperative positions.

The invention is illustrated as embodied in a machine of the typedescribed in Letters Patent of the United States No. 2,098,253 mentionedabove and reference may be made to that patent for a description of themachine structure not fully shown herein. The machine as illustratedherein is especially adapted to apply cement to the two angularlydisposed faces of a channel in a welt W (Fig. 4) produced as a result ofchanneling or splitting the welt at a certain distance from its top facein a direction more or less parallel to the said face, the splitbeginning at one edge face of the welt and terminating near the otheredge-face thereof thereby substantially dividing the welt into two flapportions which are still integral at one edge. As illustrated in Fig. 4one flap portion of a welt, split or channeled as described, is securedto a lasted shoe L by means of a seam S which attaches a sole 0 to anupper U, the other flap of the welt, after having been adhesivelyattached to the first mentioned flap, serving to hide the seam S.

For the purpose of applying cement to the channel portion of the splitwelt, the illustrated machine is provided with cement-applying means 40,flap-supporting means 52, and work-feeding means 68 the construction andfunction of which will now be described. The illustrated machine has aframe ID to which, as in the machine illustrated in the above-mentionedUnited States Letters Patent, is secured a carrier I2 supporting thework-engaging instrumentalities of the machine, The lower portion of thecarrier I2 is provided with laterally extending parallel, spaced flangesl4 (Figs. 2 and 3) which extend laterally from the carrier and supportoverhanging portions H: of a T-shaped block l6 fitted in the spacebetween the flanges. The block I6 is hollow and carries at its lowerextremity a hollow nozzle stem l8 (Fig. 2) which is in communicationwith the hollow interior of the block I 6.

For the purpose of quickly mounting and dismounting the block l6 and themachine parts.

carried by it, there is provided a curved clamping member 20 pivotallysecured at "22 to the lower end of the block it, the forked left end(Fig. 3) of the clamping member 20 engaging the lower surfaces of theflanges I4. -The upwardly extending right end (Fig. 3) of the clampingmember 28 carries a hand screw 24 engaging the upper portion of the saidblock l6. As will be seen, rotation of the screw 24 so as to move theupwardly extending right end of the clamping member 28 (Fig. 3) awayfrom the upper end of the block l6 causes the left forked end of theclamping member 20 to press firmly against the flanges 54 therebyclamping the portions l5 of the block l6 firmly against the flanges I 4.

At its upper end, the block it is in communica- I tion with a conduit 26provided at its lower end with a flange 28 firmly secured to the topface of the block 15. The conduit through which cement is pumped underpressure into the nozzle stem I 8 is provided with a shut-ofi valve 30which is controlled by mechanism to be described later. The upper end ofthe conduit 26 is threaded in a T-fitting 32, one end of which supportsa pressure gage 34 and the other end of which is in communication with aflexible tube 36 through which the cement is pumped under pressure.

To adapt the machine particularly to apply cement to split welts asdescribed, it is provided with a nozzle 40, such as that illustrated inFigs. 6 and 8 of the above-mentioned patent, especially suitable forthat purpose. The nozzle has a hollow main portion which is secured byscrews 39 or the like to a flange 38 provided at the lower end of theabove-mentioned nozzle stem E8. The lower end 42 of the nozzle istapered as seen in side elevation (Figs. 1 and 4) and is of asubstantially triangular shape as seen from the front of the machine(Fig. 3). The leading edge of the nozzle end 42 is provided with a hole43 (best shown in Figs. 2 and 4) through which cement is extruded andapplied to the channel bottom of the split welt. Secured to a lugprovided at the trailing end ofthe main nozzle portion is a small plate44 the lower end of which is tapered in conformity to the tapered shapeof the nozzle end 42 and overlies a perforated intermediate plate 4|.The said lower end of the plate 44 is spaced from the plate 4| and thelower end of the latter is maintained at a certain distance from theopen trailing portion of the nozzle end 42 thereby providing two,parallel, substantially V- shaped slots through which the cement isapplied to the angularly disposed split faces of the welt.

To support the free flap portion F of the split welt, that is the flapportion which is not secured to the lasted shoe by the seam S, duringthe cement-applying operation and particularly to hold that portionwhich has a wavy irregular shape against the cement-applying nozzle sothat a uniform coat of cement may be applied thereto, there is provideda flap-supporting means 52 which, as illustrated, is in the form of afinger. For supporting and actuating this finger, the nozzle stem I 8carries a block 45 to which is pivotally secured at 46 (Figs. 2 and 3) atwoarmed lever 48. The right arm (Fig. 3) of said lever 43 is providedwith alug 50 (Fig. 2) in which is secured, as by a draw-bolt 5|, afinger 52 serving to engage and support the said flap portion of thesplit welt and to hold it against the nozzle during the cement-applyingoperation. The upper surface of the left arm (Fig. 3) of this lever 48is engaged by a spring-pressed plunger 54 mounted for vertical movementin a bore in the carrier l2 and tending to depress the left arm of thelever 48 thereby holding the flap-supporting finger 52 in the positionshown in full lines in Fig. 3. For the purpose of swinging the lever 48in a clockwise direction as seen in Fig. 3 against the resistance of theplunger 54 to move the finger 52 into its flap-engaging operativeposition illustrated in broken lines, the end of the left arm of thelever 48 is pivotally secured to a link 56, the upper end of which ispivotally secured to a bell crank lever 58 (Fig. l) pivoted to thecarrier l2. The bell crank lever 58 is operated by mechanism to bedescribed later.

For the purpose of positioning and feeding the work presented to themachine, there is provided, .as in the machine of the above-mentionedUnited States Letters Patent, a feed wheel 68 which is positively drivenand which is carried by a support 62. A spring 65, one end of which issecured to the machine frame and the other end of which is secured tothe said support 82, tends to hold the support 62 and the feed wheel 60in an elevated inoperative position. The support 62 is connected totreadle operated mechanism which upon depression of the treadle causesthe support to be swung downwardly against the tension of the spring 85to hold the feed wheel 60 yieldingly in engagement with the work, in thepresent case in engagement with the side portions of the upper U of thelasted shoe.

The above-mentioned treadle controlled mechanism includes a treadle rodthe upper end of which is secured to a link 72. of the link 12' has aslot 13 engaged by a pin 14 secured to a lever 16 normally held in itsupper inoperative position by a spring H. In the inoperative position ofthese machine parts the pin 74 is at the lower end of the slot 13.depression of the treadle (not illustrated) the treadle rod 18 and thelink 72 are moved down. The lever 16 at first remains stationary due tothe lost motion provided by the slot 13. Upon engagement of the upperend of the slot 13 with the pin 14 and upon continued downward movementof the treadle rod 10, the lever 16 is swung downwardly against thetension of its spring 11. The right end (Fig. 1) of the lever 76 isconnected by means of a link 18 to a lever 80 secured to and extendinglaterally from a rod 82 which by means of a universal joint 84 isconnected to a rod 85 the rod 88 being connected by means of a universaljoint 88 to the stem of the above mentioned valve 30 that controls theflowage of cement through the conduit 26 into the nozzle 40. As will beseen, downward swinging movement of the lever 16 causes a rockingmovement of the rods 82, 86 which is imparted to the valve 30 and whichcauses the valve 30 to be opened. The illustrated machine is alsoprovided with means actuated by the above-mentioned treadlecontrolledmechanism of the machine to cause movement of the flap-supporting finger52 into operative position upon depression of the treadle. Asillustrated in Fig. 1, the upper end of the link 12 is pivotally securedat 83 to the right arm of a three-armed lever 85 pivotally secured tothe machine frame. A forked upwardly-extending arm ofthelever 85engages. a pin "carried by the Upon lower end of a lever 89 the upperend of which is pivotally mounted in the machine frame. Near its lowerend the lever 89 is connected to ahorizontal rod 90 the left end ofwhich (Fig. l) is pivotally secured to the upwardly extending arm of theaforementioned bell crank lever 58 that controls the movement of thefinger 52. The swinging movement of the three-armed lever 85 inclockwise direction (Fig. 1) by the depression of the treadle is limitedby the engagement of an arm- 92 of the lever 85 with a fixed abutment94. As will be seen, depression of the treadle serves to move the drivenfeed roll 60 into engagement with the work and simultaneously causes thefinger 52 to be moved into operative position. Thereafter, that is afterthe pin 14 carried by the lever 16 has been engaged by the upper end ofthe slot 13 of the link 12, the valve is opened with the result thatcement is extruded through the nozzle into the channel portion of thewelt, shortly after the feed movement of the work has been initiated.

The operation of the illustrated machine will be apparent from theforegoing description but will be briefly summarized now. A lasted shoeto which has been secured a channeled or split welt is presented to themachine with the bottom portion of the shoe extending in a verticaldirection and with the tread face of the outsole facing the operator.The shoe is so presented that the tapered end portion 42 of the nozzle40 engages within the channel portion of the welt, as illustrated inFig. 4. Upon depression of the treadle, the feed wheel 60 which iscontinuously driven by the power means of the machine is moved intoyielding contact with the lasted upper of the shoe and simultaneouslythe finger 52 is moved into contact with the outer face of the (in Fig.4) right fiap portion F of the portion against the nozzle. After theupper end of the slot 15 has engaged the pin 14, the lever i5 is swungdownwardly and the valve 30 is opened and cement is extruded into thechannel portion of the split welt.

By reason of the feed action of the feed wheel 60 the entire split Weltis moved past the nozzle and its channel portion is coated with cementwhereupon the operator upon releasing the treadle causes the valve 3|]to be automatically shut by reason of the fact that the lever 16 isimmediately swung upwardly by the strong spring ll (Fig. 1) The upwardmovement of the treadle rod is by its spring also causes a returnmovement of the rod 90 toward the left of Fig. 1, thereby swinging thefinger 52 into its inoperative position with the assistance of thespring-pressed plunger 5 Finally, the upward movement of the treadle rod18 also permits the spring 65 to move the support 62 of the feed roll 60into its inoperative upper position.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. In a machine for cementing theangularly disposed faces of a channelin a strip split to form two flaps, one of which is secured to a pieceof work, a tapered nozzle to apply cement to the said angularly disposedfaces, and means for holding the loose fiap of the said strip incementreceiving contact with one side of the nozzle during thecement-applying operation.

2. In a machine for cementing the channels of split welts attached tolasted shoes, a tapered nozzle for engaging the channel of a split welt,a driven feed wheel on one side of the nozzle, the

welt to hold that flap said wheel engaging the upper ofa lasted shoepresented to the nozzle to move the split welt past the nozzle, andvmeans located between the nozzle and the feed wheel for holding oneportion of the split welt against the nozzle.

3. In a machine for cementing split welts attached to a lasted shoe, atapered nozzle for engaging the channel of a split Welt, a driven feedwheel on one side of the nozzle engaging the upper of a lasted shoepresented thereto to move the split welt past the nozzle, and a fingerlocated at the same side of the nozzle as the feed wheel for holding oneportion of the split welt against the nozzle.

4. In a machine for cementing. split welts, a nozzle for engaging asplit welt, a driven feed member for causing the split welt to be movedpast the nozzle, means located between the nozzle and the feed memberfor holding one portion of the split welt against the nozzle, springmeans for holding the said holding means in inoperative position, andoperator-controlled means to move the said holding means intowork-engaging position.

5. In a machine for cementing split welts, a nozzle for engaging thechannel of a split welt, means for controlling the flow of cementthrough said nozzle, a driven feed wheel for causing the split welt tobe moved past the nozzle, operatorcontrolled means for moving the feedwheel into engagement with the work and for operating the said means forcontrolling the flow of cement through said nozzle, and a finger locatedbetween the nozzle and the feed wheel for holding one portion of thewelt against the nozzle, the said operator-controlled means also servingto move the said finger into work-engaging position.

6. In a machine for cementing split welts, a nozzle 'for engaging thechannel of a split welt, a finger for holding one portion of the splitwelt against the nozzle, a support for said finger pivotally mounted onthe nozzle, spring means engaging said support to maintain the finger ininoperative position, and operator-controlled means for swinging saidsupport to move the said finger into work-engaging position.

'7. In a machine for cementing split welts, a nozzle for engaging thechannel of a split welt, a driven feed wheel for causing the split weltto be moved past the nozzle, a finger for holding one portion of thesplit welt against the nozzle, a common support for the nozzle and thefinger, and means for clamping both the nozzle and the finger to thesaid common support.

8. In a machine for cementing the channels of split welts attached tolasted shoes, a tapered nozzle for engaging the channel of a split welt,a valve for controlling the flow of cement through said nozzle, a drivenfeed wheel on one side of the nozzle engaging the upper of a lasted shoepresented to the nozzle to move the split welt past the nozzle, a fingerlocated between the nozzle and the feed wheel for holding one portion ofthe split welt against the nozzle, a support for said finger pivotallymounted on the nozzle, spring means engaging said support to hold saidfinger in inoperative position, and treadle-controlled means formaintaining the feed wheel in yielding engagement with the work and foroperating said valve to cause cement to be extruded through the nozzle,said treadle-controlled means also serving to move the said supportagainst the pressure of the spring means engaging it to move said fingerinto work-engaging position.

WILBUR L. MACKENZIE.

